Warp stop-motion for looms.



No. 673,825. Patented May 7, |90l.

E. S. STIMPSON. f

WAR? STOP MOTION FOR LOOMS.

(Application led Nov4 30, 1900.)

2 Shats-Sheet I.

(N0 Model.)

1HE Noam: vntkx co. PNUTO-Lrmu. WASNIMGYON. p. c. V

Ulu Model.)

, Patented May 7, |90I. E. S. STIMPSON.

WARP STOP MDTION FR LUOMS.

(Application led Nov. 30, 1900.)

i 2 Shee'ts-Sheet 2.

Kw1@ STATES EFICE.

EDWARD S. STIMPSON, OE I-IOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

WARP STOP-MOTION FOR LOOWIS.

SPECIFICATION forming part of Letters Patent No. 673,825, dated May '7, 190]. Application iled November 30, 19Q0. Serial No. 381093. (No model.)

To all whom, it may concern:

Be it known that I, EDWARD S. STIMPsoN, a citizen of the United States, and a resident of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Warp Stop-Motions for Looms, of which the following' description, in connection with the accompanying drawings, is a speciiication, like characters on the drawings represen ting like parts.

This invention relates more especially to warp stop motion apparatus particularly adapted for use in connection with looms for weaving, the movement of a controlling-detector into abnormal position, as by breakage of a warp-thread which controls it, being made operative to effect the actuation of suitable stopping means. The mechanism by which the release of a detector is made effective to operate, causing operation of the stopping means, is novel, and it is devised to operate with very little strain upon the detector coperating therewith.

The various novel features ot myinvention, one practical embodiment of which is hereinafter illustrated and described, will be fully set forth in the specication, and particularly pointed out in the following claims.

Figure 1 is a transverse sectional view of a loom having one embodiment of myinvention applied thereto, taken on the line oc Fig. 2, looking toward the left. Fig. 2 is a rear elevation of a portion of the mechanism shown in Fig. l at the right-hand side of the loom. Fig. 3 is an enlarged sectional detail on the line o; 0c, Fig. 2, showing the lease-rods, the detectors, and the means for cooperating with a released detector. Fig. 4 is an enlarged detail on the line x no', Eig. 2, looking down; and Fig. 5 is an enlarged side elevation of the feeler device which cooperates with a released detector.

The warp stop-motion `is herein shown as applied to a loom of usual construction, in which I have shown the lay A3, breast-beam A40, harnesses H, (see Fig. 1,) the shipper-handle S, and its holding-plate N, all being ot' usual or well-known construction.

The loom sides A have securely bolted thereto stands ax, to which are secured depending brackets BX, having bosses b to support rotatable lease-rods L L', the manner of supporting the leasei'ods forming no part of this present invention. Below and between the lease-rods I have herein shown two transverse parallel supports or bars d extending from one to the other bracket BX and extended through the detector d, each detector having an elongated longitudinal and closed slot d', through which the warp-thread and also the support b are passed, the length of the slot being greater than the depth of the support, as clearly shown in Fig. 3, so that should a warp-thread break its detector will descend into abnormal operative position.

The detectors are herein shown as arranged in two banks or series, and they engage the warp-threads between the lease-rods, each series engaging one of the devices ot' the warp into which it is divided, the front series of detectors engaging the section w of the warp, while the rear bank of detectors engages the other warp-section w. With this construction the contact of the detector with its thread is independent of other threads, so that the parts are lnot crowded together and knots or bunches can readily pass. The cooperating feeler is preferably made double, one part to cooperate with a released detector of each series or bank, although the two parts are rigidly connected and moveV as one.

The lower ends of the brackets BX are recessed, as at b', to receive the ends of a casting comprising end pieces c and two parallel transverse connecting-bars c', the ends c resting in the seats o' and being held in place by suitable retainingbolts b2. The transverse bars c/ are located below the lower ends of the two series of detectors, as clearly shown in Figs. l and 3, and each bar is transverselyy notched or serrated along its top to present a series of teeth c2, each tooth having one side, as 2, upright or vertical, and its other side, as 3, (see Fig. 5,) inclined, and, furthermore, each bar is longitudinally slotted or recessed to divide the teeth or serrations c2 into two parallel series, the teeth in each being similarly arranged or side by side, as will be clear from an inspection of Fig. 4. The other member of this device for cooperating with a released detector constitutes the feeler proper and is shown as a IOO comb-likebar f, having upturned tines f, which are preferably oppositely beveled or pointed at their upper ends, as at 5, (see Fig. 5,) and extend above the tops of the toothed bars c', the tines f/ being so disposed that they correspond in`number to the number of teeth c2.

movement of the feelers, said lips separating the extensions f2 and serving to guide them.

Referring now to Fig. 5, it will be manifest that if a detector is released by its warp-th read it will descend until its lower end passes between two of the points of the comb-like member f, and if such points are opposite two of the teeth c2 the bottom of the detector will rest on the inclined sides 3 of such teeth, as shown in Fig. 5. If now relative longitudinal reciprocalory motion of the tooth and comb-like members is normally effected, it will be obvious that when such movement operates to press the iiat face of the detector against the upright sides 2 of the ,teeth the relative reciprocatory movement will be arrested.

In the present embodimentof my invention the fixed member operates as a back-stop- Viz., the serrated bar or bars c-while the movable member is the comb-like feelerf. If the latter is moving to the right, Fig. 5, and a detector is released and assumes the position shown in said figure continued movement of the feeler to the right will not'be interfered with, as the' inclined sides of the teeth will 1 lift the detector as the detector is slid over such teeth; but if the feeler is moving in the opposite direction, or to the left, the detector between two of its tines will be brought against the straight upright sides 2 of the teeth, and the movement of the feeler will be arrested. The detector is engaged about midway between its' upright vlongitudinal edges by the points of the feeler and oppositely engaged closely `adjacent to the feeler and on each side thereof, on its 'flat face, by the back-stop teeth, so that the strain upon the detector is Well distributed and not concentrated upon any one small point. This is of considerable material importance, inasmuch as the detectors are preferably made of thin flat sheet metal stamped or punched out to shape and from their very nature unable to stand improperly-distributed or greatly-concentrated strains. The double feeler is reciprocated by means to be described in its feeling direction by gravity, as herein shown, and in its opposite direction oppositely.

A rock-shaft gx is mounted in one of the brackets Bx, (see Fig. 2,) said rock-shaf t hav- One of such comb-like membersf is mounted between the two series of teeth of ing a depending arm g, through which is extended a pin g, which is embraced by the notches f3 of the two feeler extensions, said rock-shaft having a second arm g2 substanally connected with a link g3. The lower end of the link is pivotally connected at S with an arm 7i, forming a part of a n-shaped follower, fast on a pin h', mounted to rock in a yoke-like extension m, rigidly secured or forming part of the upper end of a longitudinally-moving link M, which is hooked at its upper end, as at mx, (see Figs. l and 2,) to embrace the cam-shaft Ox of the loom, a feeler-actuating cam C being rigidly secured to the said shaft and acting along its periphery upon the follower hx. Rotation of the shaft Cx takes place in the direction of the arrow 20, Fig. l, and the high portion of the cam C rocks the follower and elevates its arm h to thereby lift the link g3 and through the bell-crank g g2 move the feeler member longitudinally toward the right viewing Fig. 2, the weight of the link g3, arm g2, and follower operating to not only normally maintain the follower in contact with the cam, but to move or to the left, viewing Fig. 2. If on this latter or feeling movement a released detector should be encountered, such movement of the feeler will be arrested and the follower` will be held away from the periphery of the operating-cam. At such time a bunter h5, forming a part of the follower or rigidly secured thereto, will be brought into the path of a tappet t, also fast on the cam-shaft Cx, such engagement of the tappet and bunter operating to move the' link M longitudinally in the direction of the arrow 30, Fig. l. The lower end of the said link is pivotally connected with an arm e, fast on a rock-shaft e', mounted in suitable bearings on the crossgirth A10 of the frame, said rock-shaft having fast upon its outer end a knock-off lever ex, adapted to engage the lower end of the shipper-lever, and when the link M is moved longitudinally, as described, the rocking of the rock-shaft c causes the knock-o arm ex to release the shipper-handle from its holding-notch to slip the belt from the fast to the loose pulley in well-known manner. After a released detector has been lifted from engagement with the feeler and back-stop devices and its thread pieced up the loom is in condition to be started, the action of gravity operating to restore the follower hx to normal engagement with its controlling-cam C as soon as the cause of stoppage of the feeler has been removed. Cross-rods 1330 serve to stiffen and brace the brackets Bx, with which they are connected.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a warp stop-motion, a series of controlling-detectors normally maintained inoperative by the warp-threads, and having thin,

tially at right angles to the arm g and pivot.

the feeler member in the opposite direct-ion,VY

IOO

TIO

flat lower ends and means to coperate therewith, comprising a member located below the detectors and having two parallel series of nptnrned teeth, one side of each tooth heilig vertical, a cooperating, comb-like member located between the said series of teeth and having its straight-sided upright tines projecting above the series of teeth, and means to normally eect longitudinal reciprocation of the comb-like member, a released detector by its engagement with both members effecting the arrest of the comb-like member.

2. In a warp stop-motion, a series of controlling-detectors normally maintained inoperative by the warp-threads, and means to cooperate with a released detector, comprising a fixed longitudinallyrecessed member located below the detectors and transversely1 notched to present two similarly-located and parallel series of teeth having each a vertical and an inclined side, a cooperating comb-like member supported between said series of" teeth and having its straight-sided upright tines oppositely beveled at their tips and projecting above the teeth, and means to normally effect longitudinal reciprocation of the comb-like member,a released detector passing between two adjacent tines and engaging the vertical faces of the adjacent fixed teeth, to arrest the movement of the feeler.

3. In a warp stop-motion for looms, a series of detectors normally maintained inoperative by the warp-threads, a feeler to coperate with a released detector, stopping means,

and operating connections between the feeler and said means, including a feeler-controlling cam, a longitudinally-movable link,a follower mounted thereon and normally cooperating with the cam, a bunter governed by the follower, and a rotating tappet to move said link longitudinally when the tappet engages the bunter, arrest of ihe feeler by a released detector operating through the follower to hold the bunter in the path of the tappet.

4. In a warp stop-motion for looms, a series of detectors normally-maintained inoperative by the warp threads, a feeler to cooperate with a released detector, stopping means, and operating connections between the feeler and Said means, includinga feeler-controlling cam, a longitudinallymovable link, a nshaped follower pivotally mounted thereon and normally cooperating with the cam, a bunter rigid with the follower, and a rotating tappet, arrest of the feeler by a released detector holding the follower away from the cam and bringing the bunter into the path of the tappet, to move the link longitudinally and effect the operation of the stopping means.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD S. STIMPSON.

Witnesses:

GEORGE OTIs DRAPER, ERNEST W. Woon. 

